Coupling



FIG. 1 is perspective view of the coupling.

FIG. 2 is a side view of the coupling; and,

FIG. 3 is an end view of the coupling.

The dashed broken lines in the drawing depict portions of the couplingthat form no part of the claim. The dash-dot broken lines define theboundaries of the claim and form no part thereof.

CLAIM The ornamental design for a coupling, as shown and described. 